Meaning of trachyte

tra•chyte

Pronunciation: (trā'kīt, trak'īt), [key]
— n.
  1. a fine-grained volcanic rock consisting essentially of alkali feldspar and one or more subordinate minerals, as hornblende or mica: the extrusive equivalent of syenite.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.